Iethod of testing the tensile strength of chains



(N0 Mudel.)

W. KENT.

METHOD OF TESTING TENSILE STRENGTH OP CHAINS, 65c.

Patented Feb. 15, 1887.

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UNITED STATES PATENT OFFICE.

WILLIAM KENT, OF JERSEY CITY, NEIV JERSEY.

METHOD OF TESTING THE TENSILE STRENGTH OF CHAINS, 800.

SPECIFICATION forming part ofLetters Patent No. 357,715, dated February 15, 1887. Application filed May 16, 1885. Renewed April 9, 1886. Serial No. 198,380. (No model.)

To all whom it may concern:

Be it known that I, WILLIAM KENT, a citizen of the United States, residing at Jersey City, in the county of Hudson and State of New Jersey, have invented certain .new and useful Improvements in Methods ofTesti mg the Tensile Strength of Chains, 8m; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to certain novel and useful improvements in the method of testing the tensile strength of chain, rope, wire, &c., and has for its object to make a deadweight test throughout the entire length of the chain without any special manipulation of the latter; and with these ends in View my invention consists in the process hereinafter fully explained, and then specifically designated by the claim.

In order that those skilled in the art to which my invention appertains may fully understand its construction and operation, I will proceed to describe the same in detail, referring by letter to the accompanying drawings, forming a part of this specification, in which- Figure 1 is a side elevation of a machine constructed to carry out my improvement; Fig. 2, an end view of the same; and Figs. 3, 4, and side elevations illustrating modified forms of my invention.

Similar letters denote like parts in the several figures of the drawings.

One end of the chain is fastened to the extremity of a drum, A, and the latter revolved until the chain is wound around the same. The free end of the chain is then passed under a pulley, B, and secured slackly to the drum. The pulley is journaled in any suitable block, 0, from which depends a rod-support, D, for weights. The drum is journaled between uprights E.

Weights are placed upon the support D according to the strength to which the chain is to be tested. As the drum revolves the chain will be wound from one end of the drum and unwound toward the other, so that it will be readily understood that the strain caused by the weights will be applied to every link of the chain throughout its length.

In Fig. 3 I have shown a modified way of getting the strain on the chain by means of steam-pressure introduced through a flexible tube, F, within a cylinder, G. A piston-head, H, (shown in dotted lines,) is secured to the lower end of the rod D and fits within the cylinder, and the latter is provided with rollers I, which permit it to travel freely along the bottom of the bed J. The strain may be determined by a pressure-gage, K.

In Fig. 4 I have shown the weight of the whole device supported upon platfornrscales, so that the strain caused by the steam-pressure will be denoted by the scales.

In Fig. 5 I have illustrated a modification differing from Fig. 4 only in the manner of getting the strain. In this case the rod D is swiveled to the pulley-block and threaded. Below the scaleplatform the rod passes through a nut, L, which is provided with rollers, so that it will travel along the bottom of the platform.

I do not wish, therefore, to be confined to any particular way of applying the strain, as it will be seen that I can accomplish this in several ways.

What I claim as new, and desire to secure by Letters Patent, is-

The method herein described of testing chain,

wire, rope, &c., the same consisting in attaching the ends of the chain, &c., around a rotary drum in such manner as to leave a depending slack, applying a strain to said slack portion, and causing said strain to pass over and be applied to each successive part or link from end to end, substantially as set forth.

In testimony whereof I affix my signature in presence of two witnesses.

. WILLIAM KENT. lVitnesses:

S. S. WILLmnsoN, H. T. SHEL'roN, Jr. 

